1 files changed, 4 insertions, 4 deletions
diff --git a/node_modules/tslint/lib/verify/lines.js b/node_modules/tslint/lib/verify/lines.js
index 3b15c0875..9fb0f5ef2 100644
--- a/node_modules/tslint/lib/verify/lines.js
+++ b/node_modules/tslint/lib/verify/lines.js
@@ -86,12 +86,12 @@ exports.ZERO_LENGTH_ERROR = "~nil";
  */
 function parseLine(text) {
     var multilineErrorMatch = text.match(multilineErrorRegex);
-    if (multilineErrorMatch != null) {
+    if (multilineErrorMatch !== null) {
         var startErrorCol = text.indexOf("~");
         return new MultilineErrorLine(startErrorCol);
     }
     var endErrorMatch = text.match(endErrorRegex);
-    if (endErrorMatch != null) {
+    if (endErrorMatch !== null) {
         var squiggles = endErrorMatch[1], message = endErrorMatch[2];
         var startErrorCol = text.indexOf("~");
         var zeroLengthError = (squiggles === exports.ZERO_LENGTH_ERROR);
@@ -99,7 +99,7 @@ function parseLine(text) {
         return new EndErrorLine(startErrorCol, endErrorCol, message);
     }
     var messageSubstitutionMatch = text.match(messageSubstitutionRegex);
-    if (messageSubstitutionMatch != null) {
+    if (messageSubstitutionMatch !== null) {
         var key = messageSubstitutionMatch[1], message = messageSubstitutionMatch[2];
         return new MessageSubstitutionLine(key, message);
     }
@@ -117,7 +117,7 @@ exports.parseLine = parseLine;
  */
 function printLine(line, code) {
     if (line instanceof ErrorLine) {
-        if (code == null) {
+        if (code === undefined) {
             throw new Error("Must supply argument for code parameter when line is an ErrorLine");
         }
         var leadingSpaces = " ".repeat(line.startCol);